<template>
    <div class="cmt-container">
        <h3>发表评论</h3>
        <hr>
        <textarea placeholder="请输入要评论的内容（最多吐槽120字）" maxlength="120" v-model="msg"></textarea>
        <mt-button type="primary" size="large" @click="postComment">发表评论</mt-button>

        <div class="cmt-list">
            <div class="cmt-item" v-for="(item,i) in comments" :key="item.add_time">
                <div class="cmt-title">第{{i+1}}楼&nbsp;&nbsp;用户：{{item.user_name}}&nbsp;&nbsp;发表时间:{{item.add_time|dataFormat}}</div>
                <div class="cmt-body">{{item.content}}</div>
            </div>
        </div>
        <mt-button type="danger" size="large" plain @click="getMore">加载更多</mt-button>
    </div>
</template>

<script>
import { Toast } from "mint-ui";
export default {
    data(){
        return{
            //默认展示第一页数据
            pageindex:1,
            comments:[],
            msg:'',//评论输入的内容
        }
    },
    created(){
        this.getComments();
    },
    methods:{
        getComments(){
            this.$http.get('http://www.liulongbin.top:3005/api/getcomments/'+this.id+'?pageindex='+this.pageindex).then(result=>{
                if(result.body.status === 0){
                    // this.comments=result.body.message
                    //要让获取的第一页数据和第二页数据拼接在一起
                    this.comments=this.comments.concat(result.body.message)
                }else{
                    Toast('获取数据失败');
                }
            })
        },
        getMore(){
            this.pageindex++;
            this.getComments();
        },
        postComment(){
            //校验里面是否为空
            if(this.msg.trim().length === 0){
                return Toast('提交数据不能为空')
            }
            //参数一：请求URL地址
            //参数二：提交给服务器的数据对象{content：this.msg}
            //参数三：定义提交时候表单的数据格式，需要到main.js设置
            this.$http.post('http://www.liulongbin.top:3005/api/postcomment/'+this.$route.params.id,{content:this.msg.trim()}).then(result=>{
                if(result.body.status === 0){
                    //post成功 1.拼接出一个评论对象
                    var cmt = {user_name:'匿名用户',add_time:Date.now(),content:this.msg.trim()}
                    this.comments.unshift(cmt),
                    this.msg=''
                }
            })
        }

    },
    props:["id"]
}
</script>

<style scoped>
.cmt-container h3{
    font-size: 18px
}
.cmt-container textarea{
    font-size: 14px;
    height: 90px;
    margin: 0
}
.cmt-title{
    line-height: 30px;
    background-color: #ccc;
}
.cmt-list{
    margin: 5px 0 ;
}
.cmt-item{
    font-size: 14px;
}
.cmt-body{
    line-height: 35px;
    text-indent: 2em;
}
</style>
